Subaru Legacy (2005 year). Service manual — part 850
PS-71
POWER ASSISTED SYSTEM (POWER STEERING)
Pipe Assembly [LHD Model]
C: INSPECTION
Check all disassembled parts for wear, damage or other abnormalities. Repair or replace the defective parts
as necessary.
CAUTION:
Although surface layer materials of rubber hoses have excellent weathering resistance, heat resis-
tance and resistance for low temperature brittleness, they are likely to be damaged chemically by
brake fluid, battery electrolyte, engine oil and automatic transmission fluid and their service lives are
to be very shortened. Wipe out immediately when the hoses are adhered with the fluids.
Since resistances for heat or low temperature brittleness are gradually declining according to time
accumulation of hot or cold conditions for the hoses and their service lives are shortening accord-
ingly, it is necessary to perform careful inspection frequently when the vehicle is used in hot weather
areas, cold weather areas and a driving condition in which many steering operations are required in
short time.
Particularly continuous work of relief valve over 5 seconds causes to reduce service lives of the hos-
es, the oil pump, the fluid, etc. due to over heat.
Parts
Maintenance Parts
Corrective action
Pipe
• O-ring fitting surface for damage
• Nut for damage
• Pipe for damage
Replace with a new one.
Clamp
• Clamps for weak clamping force
Replace with a new one.
Hose
• Flare surface for damage
• Flare nut for damage
• Outer surface for cracks
• Outer surface for wear
• Clip for damage
• End coupling or adapter for deformation
Replace with a new one.
Trouble
Possible cause
Corrective action
Pressure hose burst
Excessive holding time of relief status
Instruct customers.
Malfunction of relief valve
Replace the oil pump.
Poor cold characteristic of fluid
Replace fluid.
Forced out return hose
Poor connection
Repair.
Poor holding of clip
Retighten.
Poor cold characteristic of fluid
Replace fluid.
Fluid bleeding out of hose
slightly
Wrong layout, tensioned
Replace the hose.
Excessive play of engine due to deterioration of
engine mounting rubber
Replace the parts if defective.
Improper stop position of pitching stopper
Replace the parts if defective.
Crack on hose
Excessive holding time of relief status
Replace.
Instruct customers.
Excessive tightening torque for return hose clip
Replace.
Power steering fluid, engine oil, electrolyte adhere
on the hose surface
Replace.
Pay attention on service work.
Too many times use in extremely cold weather
Replace.
Instruct customers.
PS-72
POWER ASSISTED SYSTEM (POWER STEERING)
Pipe Assembly [LHD Model]
NOTE:
It is likely that although one judges fluid leakage, there is actually no leakage. This is because the fluid spilt
during the last maintenance was not completely wiped off. Be sure to wipe off spilt fluid thoroughly after main-
tenance.
(A)
3.0 L model
(B)
Except for 3.0 L model
Fluid leaking area
Possible cause
Corrective action
Leakage from connecting portions of
pipes and hoses, numbered with (1)
through (8) in the figure
Insufficient tightening of flare nut, adhesion of
dirt, damage to flare or flare nut or eye bolt
Loosen and retighten. Replace if ineffec-
tive.
Poor insertion of hose or clamping
Retighten or replace the clamp.
Damaged O-ring or gasket
Replace O-ring or gasket pipe or hose
with new one, if ineffective, replace the
gearbox also.
Leakage from hose (9) through (13) in
the figure
Crack or damage in hose
Replace with a new one.
Crack or damage in hose hardware
Replace with a new one.
Leakage from surrounding of cast iron
portion of oil pump (14) and (15) in
the figure
Damaged O-ring
Replace the oil pump.
Damaged gasket
Replace the oil pump.
Leakage from oil tank (16) and (17) in
the figure
Crack in oil tank
Replace the oil tank.
Leakage from filler neck (18)
Damaged cap packing
Replace the cap.
Crack in root of filler neck
Replace the oil tank.
High fluid level
Adjust the fluid level.
Leakage from surrounding of power
cylinder of gearbox (19) in the figure
Damaged oil seal
Replace the oil seal.
Leakage from control valve of gear-
box (20) and (21) in the figure
Damaged packing or oil seal
Replace the problem parts.
Damage in control valve
Replace the control valve.
(22) Leakage from the joints between
cooler pipe and hose.
Insufficient tightening of connecting portion.
Loosen and retighten.
PS-00541
(10)
(17)
(1)
(13)
(19)
(4)
(2)
(9)
(8)
(7)
(12)
(15)
(14)
(11)
(16)
(18)
(5)
(6)
(20)
(3)
(21)
(22)
(A)
(B)
PS-73
POWER ASSISTED SYSTEM (POWER STEERING)
Pipe Assembly [RHD Model]
8. Pipe Assembly [RHD Model]
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Lift-up the vehicle, and then remove the front
crossmember support plate and jack-up plate.
• Large type
• Small type
• Small type (6MT model)
3) Remove one pipe joint at the center of gearbox,
and connect the vinyl hose to the pipe and the joint.
Discharge the fluid by turning steering wheel fully
clockwise and counterclockwise. Discharge the flu-
id similarly from other pipes.
4) Remove the clamp E from the return hose and
pressure hose.
(1) Front crossmember support plate
(1) Front crossmember support plate
(2) Jack-up plate
(1) Front crossmember support plate
(2) Jack-up plate
PS-00445
(1)
FS-00105
(2)
(1)
(1)
FS-00186
(2)
(1)
(1)
(1) Pipe A
(2) Pipe B
(1) Return hose
(2) Pressure hose
(3) Clamp E
PS-00446
(1)
(2)
PS-00542
(1)
(2)
(3)
PS-74
POWER ASSISTED SYSTEM (POWER STEERING)
Pipe Assembly [RHD Model]
5) Disconnect the return hose and pressure hose
from gearbox.
6) Remove the air intake duct. <Ref. to
IN(H4DOTC)-9, REMOVAL, Air Intake Duct.>
<Ref. to IN(H4SO 2.0)-8, REMOVAL, Air Intake
Duct.>
7) Disconnect the suction hose and pressure hose
from oil pump.
• Non-turbo model
• Turbo model
8) Disconnect the suction hose and return hose
from reservoir tank. Remove the oil cooler from oil
cooler bracket.
• H4 turbo model
• H4 non-turbo model
(1) Return hose
(2) Pressure hose
(1) Suction hose
(2) Pressure hose
PS-00543
(1)
(2)
PS-00688
(1)
(2)
(1) Suction hose
(2) Pressure hose
(1) Reservoir tank
(2) Suction hose
(3) Return hose
(4) Oil cooler
(5) Oil cooler bracket
(1) Reservoir tank
(2) Suction hose
(3) Return hose
(2)
PS-00459
(1)
PS-00482
(1)
(3)
(2)
(5)
(4)
PS-00697
(1)
(2)
(3)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст